JP2002079849A - Display device for vehicle - Google Patents

Abstract

(57) [Summary] [Problem] A display device for a vehicle that enables a driver to accurately warn of an abnormality by using a liquid crystal display and a HUD together, and that can prevent a driver's inattentiveness at the time of displaying an alarm. I will provide a. SOLUTION: When an abnormality occurs (Step S2 is Y
ES), when an inattentiveness of the driver is not detected (NO in steps S4 and S6), the display of the liquid crystal display provided on the instrument panel is delayed from the display of the HUD (step S8). The driver is the HU in the front view
Although the occurrence of the abnormality is grasped based on the display of D, since the warning display of the liquid crystal display is not made at this time, a situation in which the driver draws attention to the liquid crystal display and looks aside is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle display device having a head-up display for projecting and displaying information in a front view of a driver, in addition to an instrument panel display.

[0002]

2. Related Art As described in, for example, Japanese Utility Model Application Laid-Open No. 5-34023, this type of vehicle display device includes a liquid crystal display on an instrument panel and projects and displays information in a driver's front view. Head-up display (hereinafter abbreviated as HUD). These displays are used to display a warning and notify the driver when various abnormalities such as an obstacle in front of the vehicle or a deviation from the traveling lane occur in the vehicle.

As is well known, the HUD has the advantage that the driver can view the image projected from the display unit on the transmissive reflection surface formed in the front window without moving his / her eyes from the front in principle. On the other hand, there is a disadvantage that the amount of information that can be displayed is small. In other words, since the liquid crystal display has the opposite characteristics to the liquid crystal display on the instrument panel side, an abnormal alarm is simultaneously displayed on both displays in a sense of complementing both. For example, in the case of a forward obstacle, a simple warning that a forward obstacle is present is displayed on the HUD, and at the same time, detailed information such as specific distance and position is displayed on the liquid crystal display.

[0004]

However, in the above-described vehicle display device, since the HUD and the liquid crystal display are simultaneously displayed at the time of occurrence of an abnormality, the gaze screens are dispersed to induce the driver to look aside. There is a possibility.
That is, when the HUD and the liquid crystal display are compared, since the large-screen liquid crystal display is easier to draw the driver's attention, the driver is gazing forward and capturing the HUD in the visual field. In addition, the line of sight is moved to the liquid crystal display side. And the gaze movement at this time is
Unlike, for example, an air-conditioner operation, in which the driver's eyes are moved consciously after confirming the safety ahead of the driver, the driver's attention is distracted by the inattentive operation performed by the LCD display. There was a tendency.

An object of the present invention is to provide a liquid crystal display and a HU.
A vehicle display device capable of ensuring a normal driving operation by preventing the driver from looking aside at the time of displaying an alarm, while enabling the driver to appropriately warn of an abnormality by using D in combination. To provide.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a main display means provided on an instrument panel of a vehicle, and a light transmitting means provided in a front view of a driver. Head-up auxiliary display means for projecting and displaying an image on a reflective surface, side-by-side detection means for detecting a side-by-side view of the driver, abnormality determination means for determining an abnormality in the running state of the vehicle, and abnormality determination means And a display control means for displaying an alarm notifying the abnormality on the main display means and the auxiliary display means when an abnormality is determined in the vehicle. The display control means is provided, and the display control means delays the display of the main display means with respect to the display of the auxiliary display means when the inattentiveness detection means does not detect the inattentive look.

Therefore, when it is presumed that the driver is gazing forward without detecting the driver's sideways gaze, the main display is displayed with a delay with respect to the display of the auxiliary display. The driver grasps the occurrence of the abnormality based on the display of the auxiliary display means in the front view, but at this time, since the alarm display of the main display means is not made, the driver is brought to the main display means to pay attention to the driver. Can be avoided.

According to the second aspect of the present invention, when the abnormality determined by the abnormality determination means can be confirmed by the driver's forward gaze, the display control means displays the main display means for a predetermined time. I stopped later. Therefore, when the abnormality can be confirmed by forward gaze, the display of the main display means is stopped after a predetermined time, so that the driver is prevented from looking aside by stopping the display and is encouraged to gaze forward. Naturally, the cause of the abnormality is actually visually recognized.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a vehicle display device embodying the present invention will be described below. FIG. 1 is a perspective view showing an installation state of a vehicle display device according to the present embodiment. The display device has a liquid crystal display 1 as main display means,
HUD2 as auxiliary display means.
The liquid crystal display 1 is an instrument panel 3 of the vehicle.
In addition to being used for displaying various alarms related to the running of the vehicle as described later, the control panel also serves as an operation panel for an air conditioner, audio, navigation, and the like. The HUD 2 includes a transmissive reflection surface 2 a formed on a front window 4 and an instrument panel 3.
And a display unit (not shown) for projecting and displaying information on the transmissive reflective surface 2a, and the image displayed on the transmissive reflective surface 2a is visually recognized by the driver in a state of overlapping with the front view. ing.

FIG. 2 is a block diagram showing the electrical configuration of the vehicle display device. A display ECU (electronic control unit) 11 as a display control means for executing comprehensive control of the display device is provided with an input device (not shown). Output device, storage device for storing control programs, control maps, etc. (RO
M, RAM, etc.), a central processing unit (CPU), a timer counter, and the like. Air conditioners, audio and navigation ECUs 12 to 14 are connected to the input side of the display ECU 11, and a traveling monitoring E as an abnormality determining means for monitoring the traveling state of the vehicle.
CU 15, CCD camera 16 for imaging the face to detect a driver's sideways look, switch 17 for fog light
Etc. are connected. The output side of the display ECU 11 is connected to the liquid crystal display 1 and the HUD 2 described above.
Is connected.

When the air conditioner, audio, navigation and the like are used, the display ECU 11 operates, for example, based on the image information input from each of the ECUs 12 to 14, for example, the operation state of the air conditioner and audio, the navigation map, and the like. And the like are displayed on the liquid crystal display 1, and a driver's command input to switches 1 a (shown in FIG. 1) attached to the liquid crystal display 1 is output to each of the ECUs 12 to 14. Function as an operation panel for each device.

The display ECU 11 displays an alarm on the liquid crystal display 1 and the HUD 2 to notify the driver when an abnormality relating to the traveling state of the vehicle is input from the traveling monitoring ECU 15. Hereinafter, the processing performed by the display ECU 11 when this abnormality occurs will be described in detail. FIG.
5 is a flowchart showing a display control routine executed by the display ECU. Display ECU 11
Executes this routine at a predetermined control interval, and first determines in step S2 whether an alarm display is necessary based on information from the traveling monitoring ECU 15. Based on the detection of a laser radar, a CCD camera, or the like, the traveling monitoring ECU 15 detects an abnormal approach to a preceding vehicle, the presence of an obstacle in front, and a contact with a vehicle in a neighboring lane (a parallel running vehicle or an overtaking vehicle) when changing lanes. A danger, a lane departure of the own vehicle, or the like is determined, or the presence of a pedestrian is determined from a forward image captured by an infrared camera at night. In step S2, the necessity of alarm display for each of these items is determined, and when information indicating that all items are normal is input, the display ECU 11 sets N in step S2.
A determination of O (No) is made and the routine ends.

When information indicating that any of the items is abnormal is input from the traveling monitoring ECU 15, the display ECU 11 makes a positive (YES) determination in step S2 and proceeds to step S4. In step S4, it is determined whether or not the driver's inattentiveness has been detected. This judgment is C
This is performed based on image information from the CD camera 16, and the movement of the driver's pupil is detected by image recognition to determine the presence or absence of looking aside. Step S4 without detecting the driver's side-view
If the determination is NO, it is determined in step S6 whether the switches 1a attached to the liquid crystal display 1 are operated. If the determination is NO without the switch being operated, the process proceeds to step S8. Display ECU for executing the processing of steps S4 and S6
11 and the CCD camera 16 function as side-by-side detection means in the present embodiment.

In step S8, an alarm corresponding to the item determined to be abnormal by the traveling monitoring ECU 15 is displayed on the liquid crystal display 1 and the HUD 2. In this case, the HUD 2 is displayed in advance and a predetermined time is displayed. After a time (for example, 2 seconds), the liquid crystal display 1 is displayed. For example, if a pedestrian is detected ahead at night,
A simple warning that a pedestrian is present is displayed on the HUD 2, and then detailed information such as a specific distance to the pedestrian and a pedestrian position is displayed on the liquid crystal display 1. In the present embodiment, a warning by sound is issued simultaneously with the display of the HUD2.

As described above, since the driver's sideways gaze is not detected and the switch of the liquid crystal display 1 is not operated, the driver in this case gazes ahead without looking sideways. It is inferred that. And
The driver grasps the occurrence of the abnormality on the basis of the display of the HUD 2 in the front view, but at this time, the warning display of the liquid crystal display 1 is not made. Therefore, the driver keeps his or her gaze on the front side without paying attention to the liquid crystal display as in the prior art described above.
Then, when the liquid crystal display 1 is displayed thereafter,
After confirming the safety in front of the driver, the driver consciously moves his or her line of sight to the liquid crystal display 1 side, and takes measures such as deceleration when there is a pedestrian based on the displayed detailed information.

On the other hand, step S4 or step S6
Is YES, ie, the CCD camera 16
When the driver's inattentive action is detected or when the switch operation of the liquid crystal display 1 is performed, the process proceeds to step S10 and the liquid crystal display 1 and H
An alarm is simultaneously displayed on UD2. The driver looks aside when the switch operation is performed as well as when the sideview is detected by the CCD camera 16, and in this case, the driver gazes at the liquid crystal display 1. Probability is high. Therefore, displaying the liquid crystal display 1 immediately allows the driver to quickly grasp the situation and shortens the time of inattentive look, so that such processing is performed.

In the following step S12, the display E
The CU 11 determines whether the fog light is on based on the switching state of the switch 17, and terminates the routine if YES. When the determination in step S12 is NO, the process proceeds to step S14, where the traveling monitoring ECU 15
It is determined whether or not the item determined to be abnormal can be confirmed by the driver by gazing forward, and if NO, the routine ends. Also, the determination in step S14 is YE
In the case of S, the process proceeds to step S16, and the liquid crystal display 1 started in step S8 or step S10.
Is stopped after a predetermined time (for example, 2 seconds), and the routine ends.

For example, a parallel running vehicle or an overtaking vehicle in the adjacent lane is located laterally or behind the own vehicle, so that it cannot be confirmed even if the driver gazes ahead, Is more uncertain than an infrared camera, so pedestrians at night can be considered virtually unrecognizable,
In these cases, the determination in step S14 is NO.
The display on the liquid crystal display 1 at this time is such that the cause of the abnormality determination (for example, the presence of a pedestrian) is eliminated and step S2 is performed.
Is continued until the determination is changed to NO, and the driver's action is performed as described above based on the display.

Further, since an abnormal approach to the vehicle in front, an obstacle in front, and a lane departure can be confirmed by gazing forward, the determination in step S14 becomes YES, and the display on the liquid crystal display 1 is stopped at a predetermined time. That is,
In this case, moving the line of sight to the liquid crystal display 1 and confirming the display is rather a cause of aside, but rather gazing forward to determine the actual cause of the abnormality determination (for example, a vehicle ahead or an obstacle). Since it is easier for the viewer to grasp the situation, the display is stopped to prevent side-by-side viewing and promote forward gaze. However, if the display on the liquid crystal display 1 is stopped from the beginning, the grasp of the abnormality is delayed when the driver is already watching the liquid crystal display 1, so the display is performed only for a predetermined time.

When the visibility becomes poor due to the generation of fog, it is more reliable to check the display on the liquid crystal display 1 for the vehicle ahead and the obstacle ahead. Therefore,
Such a case is determined based on the lighting of the fog lamp, and the display on the liquid crystal display 1 is continued so that the driver can visually recognize the case. As described above, the display device for a vehicle according to the present embodiment delays the display of the liquid crystal display 1 with respect to the display of the HUD 2 when it is estimated that the driver is gazing forward without looking aside. I did it. Therefore, it is possible to prevent a situation in which the driver looks aside by being attracted to the displayed liquid crystal display 1, and as a result, it is possible to encourage the driver to confirm safety ahead.

Further, when the abnormal item can be confirmed by gaze ahead, the display on the liquid crystal display 1 is stopped after a predetermined time. Therefore, the driver is prevented from looking aside by stopping the display, and is urged to look ahead, and naturally visually recognizes the cause of the abnormality determination.
It is possible to reliably grasp the situation and take appropriate measures. The description of the embodiment is finished above, but aspects of the present invention are not limited to this embodiment. For example, in the above embodiment, the main display unit is configured as the liquid crystal display 1, but a CRT may be used instead. Also, a transmissive reflection surface 2a in which auxiliary display means is formed on the front window 4.
The HUD 2 is configured to project and display information on the front window 4. However, the transmissive reflection surface 2a does not need to be provided on the front window 4 as long as it is located in the front field of view of the driver, and may be provided separately from the front window 4, for example. .

In the above embodiment, the liquid crystal display 1 is also used as an operation panel for an air conditioner, audio, navigation, and the like. Good. Further, in the above embodiment, the display on the liquid crystal display 1 is stopped after a predetermined time when the abnormal item can be confirmed by gaze ahead (step S14,
16), this process may be omitted.

[0023]

As described above, according to the vehicle display device of the first aspect of the present invention, the driver is accurately provided by using both the main display means provided on the instrument panel and the head-up auxiliary display means. When an alarm is displayed, it is possible to prevent the driver from looking aside at the time of displaying the alarm, and to prompt the driver to confirm safety ahead.

According to the vehicle display device of the second aspect of the present invention, in addition to the first aspect, it is possible to more reliably prevent the driver from looking aside and make the driver actually visually recognize the cause of the abnormality. Thus, the situation can be surely grasped and appropriate measures can be taken.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an installation state of a vehicle display device according to an embodiment.

FIG. 2 is a block diagram illustrating an electrical configuration of the vehicle display device.

FIG. 3 is a flowchart showing a display control routine executed by a display ECU.

[Explanation of Signs] 1 Liquid crystal display (main display means) 2 HUD (auxiliary display means) 2a Transparent reflective surface 3 Instrument panel 11 Display ECU (display control means, side-looking detection means) 15 Travel monitoring ECU ( Abnormality judgment means) 16 CCD camera (side-by-side detection means)

Claims (2)

[Claims] 1. A main display means provided on an instrument panel of a vehicle; a head-up type auxiliary display means for projecting and displaying an image on a transmissive reflection surface provided in a front view of a driver; An inattentiveness detecting means for detecting an inattentiveness of a driver, an abnormality determining means for determining an abnormality in a running state of the vehicle, and the main display means when an abnormality is determined by the abnormality determining means. And a display control means for displaying an alarm to notify an abnormality to the auxiliary display means. The display control means, when the inattentiveness detection means does not detect the inattentiveness, the auxiliary A display device for a vehicle, wherein display of the main display means is delayed with respect to display of the display means. 2. The display control means according to claim 1, wherein the display on the main display means is stopped after a predetermined time when the abnormality determined by the abnormality determination means can be confirmed by a driver's forward gaze. The vehicle display device according to claim 1, wherein: